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Thermal Bivvy

Adventure Medical Thermal Bivvy

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Choosing Bivy Sacks

A bivy sack is a low-profile, waterproof barrier for your sleeping bag that offers an ultra-lightweight alternative to traditional tents. Originally used by climbers who needed lightweight, compact shelters for multi-day ascents, they are also popular among backcountry minimalists who want to shave weight. They don't offer room to move, but they're easy to pack.

Structured Bivy Sacks
Structured bivy sacks, called bivy shelters, have small suspension systems that expand the head area to provide some room to sit up in. This makes the confined space more comfortable fit.
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Bivy Openings
The most basic bivy sacks have an opening at the head to let you breathe and allow moisture to escape. More advanced models use mesh panels to keep bugs out.
Related Content How to Choose the Right Camping Sleep System
Bivy Fabrics
Most bivy sacks use two different fabrics to balance protection and weight. The bottom fabric is heavier for durability. The upper fabric is usually lighter and features a waterproof/breathable laminate.
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How to Buy Snowboard Bindings

Snowboarding Is Not a Crime

A snowboard binding serves as your boot-to-board connection, and choosing the right binding means the difference between having fun and feeling furious. Most bindings are comprised of a highback, adjustable ratcheting straps, and a baseplate that’s either four-hole or Channel compatible. Additionally, every binding model is offered in a variety of sizes—it’s vital that your boot size matches the binding size. Also, keep in mind that every binding has a flex rating from soft to stiff (rather from 1 to 5) and most bindings are designed for park and freestyle, all-mountain riding, or big-mountain riding. Stiffness is often a matter of personal preference and a reflection of the terrain you ride.

Flex:

Every snowboard binding is rated on a one-to-ten flex scale. Aim for the comfort and forgiveness of a softer flex (1-3) if you’re a beginner or like a more flexible feel for riding park, and shoot for the control and support of a stiffer flex (3-5) if you’re strong, experienced, or into riding big, fast lines.

Compatibility:

Make sure to buy a binding in a size that matches the size of your boot, otherwise the straps won’t hold your boot correctly. Similarly, if you have a board with 4x4 mounting pattern or Channel compatibility, you need a binding with the same.

Riding Style:

Ride park? Look for a softer binding with some shock-absorption built in. Ride the resort? Look for a binding with a strap design you’re happy with (you’ll be using it a lot). Ride big mountain? Go stiff, strong, and (probably) expensive.